运载火箭遥测数据压缩技术研究

Study of Launch Vehicle Telemetry Data Compression Method

本研究以ＣＺ－２Ｅ运载火箭遥测数据为实例，探讨航天遥测数据的无损压缩的可能性与潜力。首先分析运载火箭一、二级第２，３，４发全部遥测数据的统计特性。广泛研究了常见压缩算法的压缩效果。在此基础上，提出了通道重组和自适应分区熵编码等改进算法，进行了仿真试验。最后，采用面向对象的编程方法，将研究成果集成为“遥测数据压缩工具包”，为固定帧格式遥测数据的无损压缩研究试验提供了有力的工具，也可用于计算机辅助教学（ＣＡＩ）。

Data compression can increase the efficiency of aerospace telemetry system by reducing storage requirements,transmission,and throughput of data. This paper briefly introduces the results of a study entitled Lossless Compression Methods Study for Launch Vehicle Telemetry Data. The purpose of the study is to examine the feasibility and the potentiality of lossless compression of launch vehicle telemetry data. Based on extensive survey and experiments on various existing lossless compression algorithms, some new hybrid adaptive encoding algorithms have been developed. Simulation results are presented depicting benefits from use of telemetry data compression on launch vehicle. Finally, the Package of Telemetry Data Compression Tools concept is described. The package is an integration of the studys results,and can provide a powerful tool for data compression study.